Drill.



1. M. BOWMAN.

DRILL.

APPLICATION men JAN. 29. 1915.

Patented July 20, 1915.

I SHAW/WM (I'M/B0 wman JAMES M. BOWMAN, E aorrnson CITY, TENNESSEE.

DRILL;

Specification of Letters Patent. I Patented 1915.

Application filed January 29, 1915. Serial No. 5,677.

To all whom it may concern Be it known that I, J AMES M. BOWMAN, a

'citizen of the United States, residing at Johnson City, in the county of l/Vashington and State of Tennessee, have invented certain new and useful Improvements in Drills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in drills, and has for its principal object to provide a drill which is capable of being operated from a number of different angles.

Another object of the invention is to provide a drill which may be used in corners and other places wherein the use of the ordinary type of drill is prevented. V

A further object of the invention is to provide a novel gripping means for the drill so that the same may be turned in one direction only. a

With these and other objects in View, the invention consists in the novel combination and arrangement of parts which will be fully set forth in the following specification and accompanying drawings, in which,

Figure 1 is a longitudinal sectional view of a drill constructed in accordance with this invention, and Fig. 2 is an end elevation showing a portion of the drill in section to more clearly illustrate the details of construction.

Referring to the drawings by characters of reference, the numeral 1 designates as an entirety the body of the drill comprising the spherical body portion 2 having formed at diametrically opposite points thereon the extensions 3 and at. The extension 3 is pro vided with the reduced screw threaded cylindrical extension 5 which is arranged to receive the internally screw threaded cap 6 having the point 7 formed at its outer end. This point 7 is arranged for engagement with a suitable support to hold the drill in position. The extension 4 is preferably formed with the interior socket 8 which is rectangular and designed to receive the butt end of the drill.

The operating lever. of the drill, which is designated generally-by the numeral 9, comprises the ring 10 which is formed with the radial extension 11 having formed therein a socket 12 for the reception of a threaded whole to turn.

extension 13 of a handle 14. This ring 10 is of a suiiicient diameter to fit the curvature of the sphere 2 and is formed at a point diametrically opposite the extension 11 with a suitable ear 15 for the reception of the bolt 16 which holds the cooperating .ring 17 in place. The cooperating ring is formed with a suitable ear 18 for the reception of the bolt 16 and at a diametrically opposite point with the extension 19 which is provided with the inclined end 20 to fit against the inclined portion 21 of the extension 11.

A suitable bolt 22 is extended through the v extension 11 and portion 19 and holds the two rings in place on the spherical body 2. The rings 10 and'17 are each formed with the recesses 23, the inner walls of which-are inclined as at 2 1 and slightly arcuate to cause the roller 25, which is shaped as at26, to conform to the curvature of the sphere 2 a to roll onto and firmly against the sphere, thus forming a frictional engagement between the operating lever 9 and the body 1.

In operation it will'be apparent that the lever is oscillated and when it is forced upwardly so the roller 25 is in the position shown in Fig. 2, it will be apparent that the lever will pass freely over the surface of the sphere. In case the movement isreverscd as in the operation of the lever, it will be apparent that the roller 25 will roll against the sphere and into the opposite end of the recess 23 so that the walls 24 will force the .roller into frictional engagement with the surface of the sphere and thus cause the In this way it will be apparent that the drill will be ope'ratedin one direction only, and due to the fact that the sphere provides a universal gripping surface which will permit the handle to assume a number of different-positions, it will be evident that the drill may be used in places wheire the ordinary type of drill cannot be use While in the foregoing there has been shown and described. the preferred embodiment of this invention, it is to'be understood that such changes may be made in the combination and arrangement of parts as will fall within the spirit and scope of the invention as defined in the appended claim. What is claimed is: i A drill of the character described-comprising a spherical body, extensionsprojecting diametrically from opposite points on the spherical body, a pointed cap screw threaded on one of the extensions, a drill carried by the other extension, a ring surrounding the body, a radial extension on the ring, a handle carried by the radial extension, a cooperating ring arranged to surround the body and be secured to the first mentioned ring, both of said rings provided With a recess on their inner Walls, said recess communicating With the interior of the ring, the inner Wall of said recess being inclined forming a bearing surface, and a roller positioned Within the recess to frictionally engage the inclined Wall and the eX- terior of the spherical member and lock the spherical member and handle in operative position When the said handle is moved in one direction and to release the spherical member When the handle is moved in the 0pposite direction.

In testimony whereof I afix my signature in presence of tWo Witnesses.

JAMES M. BOWMAN.

Witnesses:

R. S. LONG, Son STRONG.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

